This fith Workshop on Circuits and System Design - WCAS 2017 is devoted to the presentation and discussion of designexperiences with a high degree of relevance in industrial, educational and research contexts, as well as innovative design methodologies and application of specific design technologies in an industrial context. The workshop is organized withintwo tracks: industrial and academic. Contributions should solutions in tomorrow’s silicon and embedded systems. The contribution should present electronic circuit and system design results from FPGA and/or ASIC prototypes, or from simulation. Designs that achieve a specific record in terms of performance, power management or any other concrete advantage compared to the state-of-the-art for a given application domain should also be submitted to this workshop. Validated methodologies and techniques through demonstration are welcome.